#include <bits/stdc++.h>
using namespace std;
#define yes cout << "YES" << endl
#define no cout << "NO" << endl
using ll = long long;
const ll N = 5e2 + 10;
ll n;
ll ux[N], uy[N], vx[N], vy[N];
void solve()
{
 
    cin >> n;
    ll ans = 0;
    for (ll i = 0; i < n;i++)
    {
        cin >> ux[i] >> uy[i] >> vx[i] >> vy[i];
    }

    for (ll i = 0; i < n;i++)
    {
        for (ll j = 0; j < n;j++)
        {
            if(i==j)
                continue;
                if(check(i,j))
                {
                    cnt++;
                }
                else {
                    continue;
                }
        }

    }
}
int main()
{
    int t = 1;
    // cin >> t;
    while (t--)
    {
        solve();
    }
    return 0;
}
